package collection;

import javax.jws.soap.SOAPBinding;
import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo {
    public static void main(String[] args) {
        Collection c =new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        c.add(new Point(1,2));
        //[元素1.toString(),元素2.toString(),元素3.toString(),.....]
        System.out.println(c);
        /*boolean contains(Object o):
        判断当前集合是否包含给定元素o
        判断依据是给定元素是否与当前集合存在equals()比较为true的情况
         */
        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含:"+contains);

        /*
        * boolean remove(Object o):------一般不接收boolean结果
        * 从当前集合中删除与给定元素o的equals()比较为true的元素
        * 若存在重复元素则只删除一次
        * */
        c.remove(p);
        System.out.println(c);

        c.remove(p);
        System.out.println(c);

        //集合中装的是元素的引用(地址)
        Collection cc = new ArrayList();
        Point pp = new Point(1,2);
        cc.add(pp);//将pp添加到cc中------将pp的引用装到了cc中
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

        pp.setX(100);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);


/*      Collection c = new ArrayList();
        c.add("one");
        c.add("two");
        c.add("three");
        c.add("four");
        c.add("five");
        //集合重写了Object的toString()方法，返回格式如下:
        //[元素1.toString(),元素2.toString(),元素3.toString(),...]
        System.out.println(c);
        System.out.println("集合的元素个数为:"+c.size());
        //isEmpty()判断集合是否为空集(size为0表示为空集)
        System.out.println("是否为空集"+c.isEmpty());//false

        c.clear();//清空集合
        System.out.println("集合已清空");
        System.out.println(c);//[]
        System.out.println("size:"+c.size());//0
        System.out.println("是否为空集:"+c.isEmpty());//true*/
    }
}
